Classification of PVC production problems

In the PVC foam sheet extrusion process, the basic problems encountered can be grouped into four categories: first, the stability; second, the melt strength issues; third, lubrication problem; Fourth dispersion issues. In these four categories of issues, especially the first three categories of issues are mutual restraint, and influence crossly, while it is sometimes difficult to immediately distinguish from the surface phenomena of pvc foam board. Lack of stability will affect the entire board, and the foam board will be yellow with large brittleness. The deficiency of melt strength can lead to huge cell in the foam sheet and long longitudinal section bubble. The most direct way to determine whether the melt strength is insufficient is to press sheet wrapping the roller with your fingers and you can feel elasticity in the excellent melt strength. If it is difficult to bounce after the press, which means the poor melt strength.

Lubricant for the PVC material

We need to ensure good melt strength in the PVC materials, order to obtain uniform products in PVC Celuka Foam Board.The foaming agent is developed to solve this problem of the foamed article, and can effectively improve the quality of the foam pipe. Lubricant is divided into external lubricants and internal lubricants, and outer lubricant is good for releasing, which is beneficial on the surface finish. Inner lubricant is good for plasticization and the melt fluidity and it is difficult to control the thickness of the plate with insufficient inner lubricant, resulting in both sides are thin and the middle plate is thick; while if inner lubricant is too much which is prone to the phenomenon of high confluence core temperature. Poor dispersion will bring the phenomenon of unsmooth plate surface.

The process temperature control of PVC board

The above four problems are the fundamental, basic and deep-seated problem. While relative to the four questions above, the process temperature control will be more intuitive and this is the surface problem. The poor temperature control may give rise to the emergence of the fundamental problems. Improving the processing temperature will reduce the stability of material and the original lubrication balance will be broken, with the general performance of the poor external lubrication, especially the late external lubrication, and it is needed to improve the amount of external lubrication. In addition, the increase in temperature will lead to the decrease of melt strength, increase cell foam sheet, to reduce the number of cell and the sheet is easy to be broken. The raise in the temperature will also reduce the melt strength and the melt viscosity, the viscosity decreases shear dispersing reduced ability, for the screw with poor dispersion, sometimes will be dispersed unevenly.

www.potentech.com Potentech employs well-known professors and technical experts in the plastics industry to form an Expert Committee, professionally to develop and produce: PVC foam boards and sheets, PVC mouldings and Modified Engineering Plastic (granules). Poten Cellular (PTJ series) is the real Cellular PVC foam sheet, Production of Cellular technology.
 
PVC and PU is Both Faux PVC Plastic Material
Typically individuals refer dermis except genuine buckskin as PVC, PU leather because they are somewhat look unnatural or replica. Faux PVC as well as PU are among Faux PVC (plastic-type material), nevertheless the production procedure for just two goods is not the very same. You have to be careful if you wish to purchase high quality derived from one of from the reliable faux PVC memory foam panel suppliers. Right now many of us shall introduce numerous techniques to differentiate in between PU and PVC fabric.

PVC buckskin needs to adjust the particular real softness to create various products, various specifications.
In the production procedure for Imitation PVC leather, initial hot melt the particular plastic contaminants as well as mix in to insert, consistently layer on the To Or H knitted textile substrate using the recommended thickness, after which design memory foam table in the foaming furnace, making it to manage to adapt the soft qualities to create diverse products, distinct specifications. Carry out area treatment method if it's out from the heater (dyeing, embossing, sprucing, extinction, grinding fluff, which is mainly carried out in accordance with all the specific product requirements).

The particular producing means of PU leather-based is a lot more complicated compared to Faux PVC buckskin
The actual making technique of PU leather is a bit more challenging when compared with Pvc material leather-based. Since the PU base towel may be the material PU content using excellent tensile durability, that may be sprayed around the stop of fabric earlier mentioned and can integrated the base towel at the center, so that you can't start to see the information on the conclusion fabric outside. The actual bodily components involving 
faux PVC memory foam boards can be better than Imitation PVC leather. It can be resistant against twists as well as spins, that has great versatility, tensile strength along with leaks in the structure (PVC-free). Imitation PVC natural leather pattern is warm explained through metallic ornamental pattern roller; PU natural leather routine is made simply by scorching connecting the particular structure cardstock on the semi-finished leather floor, distancing your paper leather after cooling down, and then procedure the particular " light " therapy. PU buckskin cost is bending since that relating to Imitation PVC natural leather; the price tag on Faux PVC buckskin by incorporating particular specifications will be 2-3 occasions greater than PU buckskin.

Solutions to know the difference among PU and also Faux PVC
The approval range of such two resources is fairly different. It is relatively easy to tell the differences between PU along with PVC. To some extent, the PU foundation cloth will be heavier as compared to Faux PVC, which can be diverse throughout feel, the PU feels more supple and Pvc material is more hard; we can also burn them, the tastes of PU is brighter compared to Imitation PVC.